A MIMO passive wireless transmit and receive terminator system includes a base for providing a signal source and two terminators fixed substantially perpendicular to the base and parallel with each other. Each terminator includes four radiating fins spaced at approximately 90 degree intervals and has radiator plates located near the top and bottom of an outer edge of each radiating fin, a central, non-radiating portion of the outer edge separating the top and bottom radiating plates from each other and from a central metallic layer. A control circuit may be disposed within the base or the metallic layer for selectively supplying the signal source to the radiating plates of only one of the radiating fins of each terminator.